Excavating-bucket.



J. H. MURPHY.

EXGAVATING BUCKET.

APPLICATION FILED MAY 3, 1912.

1,033,822. Patented July 30, 1912.

3 SHEETSSHEET 1.

WITNESSES: INVENTOI iE. a W. Jams 17 Hwy/1y- W7 (ill/44,

A TTORNE Y.

COLUMBIA PLANOORAPH CD.. WASHINGTON. D. c.

J. H. MURPHY.

EXGAVATING BUCKET.

APPLICATION rum MAY 3, 1912.

3 SHEETSSHEET 2v N fi W M A TTORNEY.

IN VENTOR.

COLUMBIA PLANOGRMH C0,, WASHINGTON, n. c.

Patented July 30, 1912.

J. H. MURPHY.

EXCAVATING BUCKET.

APPLICATION FILED MAY 3. 1912.

1,083,822. Patented July 30, 1912.

3 SHEETS-SHEET 3.

IN VENTOR.

WITNESSES I}: cfams H-Mwp/zyg cg, p I BY ATTORNEY.

COLUMBIA PLANOGRAPH ClL, WASHINGTON. n. c.

JAMES H. MURPHY, OF ST. LOUIS, MISSOURI.

EXGAVATING-BUCKET.

Application filed May 3, 1912.

To all whom it may concern;

Be it known that I, JAMES H. MURPHY, citizen of the United States, residing at St. Louis, State of Missouri, have invented certain new and useful Improvements in Excavating-Buckets, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention has relation to improvements in excavating buckets; and it consists in the novel details of construction more fully set forth in the specification and pointed out in the claim.

In the drawings, Figure 1 is an elevation of an engine and boom, showing my improved bucket in service, the bucket being in position ready for dumping; Fig. 2 is a side view of the bucket after being dumped and lowered to the ground; Fig. 3 is a similar view showing the tackle-blocks with their dogs lowered into engagement with the bucket lever-frames, and ready to be actuated for scooping; Fig. 4 is an enlarged front view of the bucket in Fig. 1, looking at right angles thereto; Fig. 5 is a horizontal section on the line 55 of Fig. 1; and Fig. 6 is a diagrammatic view showing the cable connections between the tackleblocks carrying the dogs.

The object of my invention is to construct an excavating apparatus of the bucket or clam-shell type in which the usual threedrum engine shall be dispensed with, two drums being all that is required to operate my improvement.

A further object is to construct a bucket the pulley-blocks of which shall always be clear of the dirt or earth which is being excavated; one which is simple in construction, responsive to the manipulations of the operator, and one possessing further and other advantages better apparent from a cletailed description of the invention which is as follows Referring to the drawings, B represents a conventional boiler, and E an engine de riving its steam from the valve-controlled steam pipe P, said engine operating the hoisting-drum D. Mounted on a shaft in alinement with the shaft of the drum D is a drum D operated from a similar engine (not shown) on the opposite side of the boiler, which derives its steam supply from pipe P, the drum D controlling through suitable tackle T, the position of the boom Specification of Letters Patent.

Patented July 30, 1912.

Serial No. 694,924.

L swinging about the post or mast M. These features are shown only conventionally as they are well understood in the art and no novelty is claimed therefor.

Leading from the drum D and passing over sheaves 1, 2, 3, is a suspension cable 4: adapted to wind about said drum, the outer end of the cable being connected to the cable bail 5 the ends of which are in turn secured to the pulley or tackle blocks 6, 6, after being passed in proper direction around the pulleys of said blocks. The blocks 6 are secured between the free ends of the pairs of oscillating arms 7, 7, secured at the outer corners of the blocks, the opposite ends of the arms being hinged about the hinge-rod 8, the latter serving as a common axis for said oscillating arms 7, 7, and for the oscillating U-shaped hinged le-i ver-frames 9, 9, of the scoops or buckets 10, 10. As shown in the drawings, the arms of one frame 9 are secured to the outer faces of the end walls of a scoop, the arms ofthe opposite frame being secured to the inner faces of the end walls of the opposite scoop, so that when the scoops are closed the opposite edges of the end walls of the respective scoops will be brought into abutting, instead of a shearing relation. The closed scoops form a bucket within which the scooped dirt is confined until released by the dumping mechanism presently to be described. Connecting the bottoms of the scoops with the lower outer corners of the pulley-blocks are cables 11, 11, as shown. Disposed along the middle or transverse member of the U-shaped hinged frame 9 and having its ends bent around and secured to the sides of the frame, is a keeper or plate 12 with an outer bevel face as shown, said keeper being adapted to be engaged by the locking arm (short arm) of a latch or dog 13 pivoted at the inner upper corner of the pulley-block 6, the terminal looped ends of the long arms of the dogs being secured to a common cable or rope 14L to which in turn a single dumping or tripping rope 15 is secured.

It may be stated in passing that each block 6 has two pulleys, 6, 6, the cable 5 having-a section passing over corresponding pulleys of the two blocks in one direction and having its end secured to one block, the opposite section passing in the opposite direction over the remaining pulleys of the blocks and having its end secured to the opposite block. This is shown to best advantage in the diagrammatic view in Fig. 6, from which it is obvious that a draft or pull on the bail portion of the cable 5 (that portion coupled to the cable 4) will cause the blocks 6, 6, to approach one another thereby oscillating the arms 7, 7, upwardly,

(Fig. 2) and a release of the bail 5 will permit the blocks 6, 6, to drop down and hence oscillate the arms 7 downwardly in which: latter movement the dogs assert themselves; in a manner to be fullyunderstood from aj description of the operation .of'the bucket, which is substantially as follows :The

buckets or scoops 10 and their respective; controlling lever-frames 9 are so balanced; that when released the buckets open out? substantially as shown in Fig. 2, the frames assuming a horizontal position, beyond which they can not drop because limited by; the back wall of the bucket. If (referring; to said Fig. 2) we now slacken the rope 4E;

and hail 5, by unwinding the rope 0E thei drum D, the blocks 6 will drop. down until they rest on the frames 9 (Fig. 3) in which movement the dogs 13 (pivoted to the blocks) are caused to automatically engage the keepers 12 (the rope 15 being left hanging loose so as not to exert any pull on the cable 14) and thus lock the lever-frames 9 to the blocks. By now reversing the drum D so as to wind up and pull on the cable 4 (andbaihc able 5), the blocks will be caused to approach each other and will thus carry the levers 9 with them. In this movement the levers oscillate about the hinge-rod 8 toward each other and hence cause the scoops 10 to close, in which closing movelease of the frames 9 allows the scoops topart, the bucket thus opening and dumping the dirt at any point depending on the position of the boom L. The release of the blocks 6, 6, from their respective leverframes 9 causes them to approach one another still more (Fig. 2) though they never carry the arms 7 to a dead center, so that the latter are free to drop the moment the buckets are lowered to the ground for another out (Fig. 3) in which drop they again bring the-dogs into locking engagement with the keepers 12. This being done, a draft on the cable-4 will again close the scoops and the operation is repeated. Obviously, the dumping of the buckets or scoops 10 is facilitated by the draft exerted on the connecting cables 11, 11, the sudden release of the blocks 6, from the levers 9 upon the tripping of the dogs causing a pull on said cables and assisting in opening the buckets.

As seen from Fig. 3, which represents the bucket on the point of scooping the dirt, the tackle blocks and cables are raised above the surface operated on, so that these parts are always clear of the dirt and remain clean. The buckets when released and as they are being lowered to the ground Gr open out so as to bring the lever frames 9 into a substantially horizontal plane in which position the keepers 12 on the frames become engaged by the dogs 13, the latter by reason of the weights of their long arms readily gravitating into locking engagement with said keepers provided the rope 15 is left perfectly free.

Having described my invention, what I claim is In combination with a pair of buckets and lever arms hinged about a common axis, independently oscillating arms hinged about the said axis and free to move to and from the lever-arms of the buckets, tackle-blocks in cooperative connection with one another secured to said oscillating arms, means for locking the latter to the lever arms of the buckets with a movement of the tackleblocks toward said bucket-lever-arms, means for releasing said locking means, and a cable connection between the buckets and oscillating arms whereby upon release'of the locking means the oscillating arms may exert a draft on the buckets and assist in opening the same.

In testimony whereof Iaffix my signature, in presence of two witnesses.

JAMES H. MURPHY.

Witnesses:

EMIL STAREK, Jos. A. MI HEL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

